fix: warn or error instead of returning silent empty results - #438
fix: warn or error instead of returning silent empty results#438beardthelion wants to merge 2 commits into
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Three sites folded failures into empty results indistinguishable from genuine emptiness: - clone.rs encrypted-blobs list fetch: a non-2xx or transport error silently returned no recovered paths; now warns via emit_warning, matching the per-blob stage in the same function. - clone.rs arweave fallback: unwrap_or_default() became unwrap_or_else that warns, matching the node-recovery arm directly above it. - changelog handler: store::log failures now return a git error and list_prs failures propagate (503 when the pool is unreachable) instead of answering 200 with an empty timeline. store::log itself only returns empty when the ref genuinely does not resolve: a ref that resolves but fails to log is a read failure, not an empty repo. Closes #400.
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Included review availability: 1 review is currently available. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughThe changes propagate Git and database failures from changelog retrieval, distinguish corrupt Git history from empty repositories, and emit warnings for clone recovery failures while preserving empty recovery results. ChangesChangelog error propagation
Clone recovery warnings
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Greptile SummaryThe PR makes clone recovery failures visible as warnings and propagates changelog Git/database failures instead of silently returning empty results.
Confidence Score: 4/5The PR should not merge until The main silent-error paths are improved, but damaged ref or repository metadata can still make both Git commands fail and be returned as a successful empty history, leaving the central changelog bug incomplete. Files Needing Attention: crates/gitlawb-node/src/git/store.rs
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| Filename | Overview |
|---|---|
| crates/gitlawb-node/src/git/store.rs | Adds failed-log classification via rev-parse, but conflates missing refs with failures that make the repository or ref unreadable. |
| crates/gitlawb-node/src/api/changelog.rs | Propagates Git and database read failures and adds endpoint coverage for corrupt, unavailable, healthy, and empty states. |
| crates/gl/src/clone.rs | Routes newly handled recovery failures through visible, sanitized warnings while preserving best-effort clone behavior. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart TD
A[Changelog request] --> B[Authorize repository read]
B --> C[Run git log]
C -->|Success| D[Read merged PRs]
C -->|Failure| E[Run rev-parse]
E -->|Success| F[Return Git error]
E -->|Any failure| G[Return empty commit list]
G --> D
D --> H[Return timeline]
G -. Damaged ref metadata can reach .-> H
Reviews (1): Last reviewed commit: "fix: warn or error instead of returning ..." | Re-trigger Greptile
![greptile-apps[bot]](https://avatars.githubusercontent.com/in/867647?s=60&v=4){kind=small}
| let resolved = Command::new("git") | ||
| .args(["rev-parse", "--verify", "--quiet", refname]) | ||
| .current_dir(repo_path) | ||
| .output(); | ||
| if matches!(resolved, Ok(ref o) if o.status.success()) { | ||
| let stderr = String::from_utf8_lossy(&output.stderr); | ||
| anyhow::bail!("git log failed for {refname}: {}", stderr.trim()); | ||
| } | ||
| return Ok(vec![]); |
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When git log fails, this code treats every unsuccessful rev-parse result as proof that the ref is absent. If repository damage makes the HEAD or ref metadata unreadable, both commands fail and store::log returns an empty history. The changelog can then return a misleading 200 response instead of reporting the degraded store. Please distinguish a genuinely missing or unborn ref from repository and ref-read failures.
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Actionable comments posted: 1
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Inline comments:
In `@crates/gitlawb-node/src/git/store.rs`:
- Around line 154-158: Update the ref-resolution handling around resolved so
only a confirmed missing ref returns an empty history. Propagate repository or
command failures from the resolution probe, including invalid repository
configuration, instead of converting them to Ok(vec![]). Add a regression test
covering an invalid repository and asserting the failure is returned.
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crates/gitlawb-node/src/api/changelog.rscrates/gitlawb-node/src/git/store.rscrates/gl/src/clone.rs
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I found one incomplete-fix case that needs to be addressed before this is ready.
Findings
[P2] Distinguish malformed branch refs from genuinely empty history
crates/gitlawb-node/src/git/store.rs:155–158
This behavior also exists on the base branch. It belongs within #400 because that issue targets damaged repositories being reported as successful empty changelogs, and this PR changes the failure classifier responsible for distinguishing those outcomes.
Failure path and impact
Start with a populated bare repository whose HEAD points to refs/heads/main, verify its commit history is readable, then replace that branch ref's contents with garbage\n. The commit objects remain on disk, but the ref metadata is damaged:
git log HEADexits 128 with “your current branch appears to be broken”.git rev-parse --verify --quiet HEADexits 1, with empty stderr.- The new
Some(1)arm returnsOk([]), discarding the failed history read.
The endpoint's resolver does not prevent this: HEAD and preferred-branch resolution fail, for-each-ref ignores the broken ref, and resolve_head falls back to HEAD. Consequently, get_changelog receives a successful empty commit list. With a healthy database and no merged PRs, it returns 200 with events: [] and count: 0. If merged PRs exist, it can present a successful partial timeline with the commits omitted. Callers cannot distinguish this damaged history from genuine emptiness.
Root cause and requested correction
The classifier equates “the ref did not resolve” with “the ref is genuinely absent/unborn”. Quiet rev-parse gives the same exit code for both absence and malformed existing refs; an empty diagnostic stream does not distinguish them either. The added object-corruption test does not exercise this ambiguity because its ref remains resolvable. The non-repository test exercises a different probe exit status.
Please correct this distinction in the store::log failure path. Return an empty history only when the check establishes a genuinely missing/unborn ref; preserve a read failure for damaged ref metadata. Choose a check that retains that distinction rather than treating another unsuccessful lookup as proof of absence. The existing changelog map_err can then propagate the error through its current response handling.
The requested outcome is reliable failure classification and reporting. Keep normal ref-selection behavior, healthy-history output, and successful empty/unborn responses compatible. This finding does not require repairing repository data, changing other endpoints, or introducing a new API response format.
Regression coverage
- Add a populated-repository test that corrupts the branch ref, exercises
resolve_headfollowed bystore::log, and requires an error. Keep the commit objects intact so the test specifically covers ref metadata. - Extend the existing changelog endpoint tests with that fixture and a healthy PR database; require the existing Git-error response rather than 200/empty. This verifies the failure reaches the caller.
- Retain the healthy/unborn, corrupt-object, and non-repository cases so correcting this ambiguity preserves the behaviors already covered by this PR.
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Summary
Four sites folded failures into empty results indistinguishable from genuine emptiness: two silent recovery degrades in
gl cloneand two folds in the changelog endpoint that turned a degraded repo or DB into a 200 with an empty timeline.Motivation & context
Closes #400
A caller cannot tell "nothing recovered" from "recovery failed" or "no events" from "the store could not be read". The clone paths keep best-effort behavior but now warn; the endpoint now errors.
Kind of change
What changed
gl: the encrypted-blobs list fetch warns on a non-2xx or transport error instead of_ => return Ok(vec![]); bothrun()recovery arms go through a newwarn_recovery_failedhelper onemit_warning(the first arm's raweprintln!moves onto the test-mirrored write).gitlawb-nodechangelog:store::logfailures map to a git error andlist_prsfailures propagate instead ofunwrap_or_default.store::logitself only returns empty when the ref genuinely does not resolve: a resolving ref whosegit logfails (corrupt object, mid-read gc) is now an error, checked viarev-parsewhich resolves the name without reading objects.warn_recovery_failedwarns and returns empty;store::logempty-vs-corrupt unit test; three endpoint tests (corrupt store -> 500, droppedpull_requeststable -> 5xx, healthy commit -> 200 with the event, empty repo -> 200 empty).How a reviewer can verify
Both endpoint failure tests returned a 200-empty on the unfixed folds (verified by restoring
unwrap_or_default/ the plainOk(vec![])).Before you request review
cargo test --workspacepasses locallycargo fmt --allandcargo clippy --workspace --all-targets -- -D warningsare cleanfeat(...),fix(...),docs(...)).env.exampleupdated if behavior or config changed (or N/A)Protocol & signing impact
did:key, Ed25519 / RFC 9421 signatures, UCAN, ref certs, or P2P wire formatsNone: error-propagation and warning changes only.
Notes for reviewers
repos.rskeeps its ownunwrap_or_defaultonstore::log; the same Err still folds to an empty commits list there, so that endpoint's behavior is unchanged. Flagging in case a maintainer wants it hardened too.recover_encrypted_blobs/recover_from_arweavebodies inclone.rs(different lines than the match arms changed here); several PRs append to thestore.rstests mod.changelog.rshas only gl: add --icaptcha-proof flag to register command #193's file-mode flip.rev-parserecheck instore::logcarries an// allow-unbounded-git:marker: it extends the module's existingCommand::new("git")convention and runs at most once per already-failedgit log.Summary by CodeRabbit